tcp options dissector

void
proto_reg_handoff_foo(void)
{
    static dissector_handle_t foo_handle;
foo_handle = create_dissector_handle(dissect_UDP_1234, proto_foo);
dissector_add_uint("udp.port", 1234, foo_handle);

}

My dissector function (dissect_UDP_1234) will be called for UDP traffic on port 1234. (http://www.wireshark.org/docs/wsdg_html_chunked/ChDissectAdd.html)

Is there a similar way to do this: my dissector function (dissect_TCP_OPTIONS_123) will be called, if TCP options 123 is present?

Can I write something like this:

dissector_add_uint("tcp.options", 123, foo_handle);

But it did’t work for me. :(

Any suggestion how to do this, other than modifying packet-tcp.c file.

Thanks